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Re: [Qemu-devel] [PATCH] hw/arm/virt: Allow zero address for PCI IO spac
From: |
Laurent Vivier |
Subject: |
Re: [Qemu-devel] [PATCH] hw/arm/virt: Allow zero address for PCI IO space |
Date: |
Fri, 16 Oct 2015 10:52:00 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.1.0 |
On 13/10/2015 15:55, Peter Maydell wrote:
> On 13 October 2015 at 14:25, Peter Maydell <address@hidden> wrote:
>> On 13 October 2015 at 14:19, Michael S. Tsirkin <address@hidden> wrote:
>>> On Tue, Oct 13, 2015 at 02:12:34PM +0100, Peter Maydell wrote:
>>>> Well, if we're going to go around and fix the machines which
>>>> don't get things right, I guess. It's a shame the default for
>>>> the global is "this machine is broken", because now every
>>>> new machine will default unnecessarily to broken, and there's
>>>> no way to grep the source tree for machines which need fixing.
>>
>>> It'd be easy enough to revert the logic if someone's willing to start on
>>> this. I'm reluctant to make this patchset depend on changing all
>>> machines, but if you think I'm wrong, pls let me know.
>>
>> Most machines don't have a PCI controller, luckily.
>> I'll have a look at how many files it would touch...
>
> So, first up I'm happy that the gpex and versatile
> pci controllers don't have this problem (the way they
> set up the mmio and io windows means there won't be
> overlaps). That leaves the following pci controllers,
> which I've listed with the source files which define machines
> that use them:
>
> hw/pci-host/pbm
> hw/sparc64/sun4u.c
> hw/pci-host/bonito
> hw/mips/mips_fulong2e.c
> hw/pci-host/grackle
> hw/pc/mac_oldworld.c
> hw/pci-host/piix
> [the x86 systems]
> hw/pci-host/ppce500
> hw/ppc/e500.c
> hw/pci-host/prep
> hw/ppc/prep.c
> hw/pci-host/q35
> [x86 systems]
> hw/pci-host/uninorth
> hw/ppc/mac_newworld.c
> hw/alpha/typhoon
> used in hw/alpha/dp264.c
> hw/mips/gt64xxx_pci
> hw/mips/mips_malta.c
> hw/ppc/ppc4xx_pci
> hw/ppc/ppc440_bamboo.c
> hw/ppc/spapr_pci
> hw/ppc/spapr.c [already marked as '0 addrs ok']
> hw/s390/s390-pci-bus
> hw/s390/s390-virtio-ccw.c
> hw/sh4/sh_pci
> hw/sh4/rd2.c
>
> So we'd need to touch perhaps fifteen files in total.
>
> I don't insist we do that rather than applying this particular
> patch, but I don't think it's a huge effort.
I'm going to remove the zero address checking and try to start a qemu
for each of them to see which ones are broken.
I remember from a previous discussion on my initial patch that x86
should be ok.
> thanks
> -- PMM
>
Laurent
- Re: [Qemu-devel] [PATCH] hw/arm/virt: Allow zero address for PCI IO space, (continued)
- Re: [Qemu-devel] [PATCH] hw/arm/virt: Allow zero address for PCI IO space, Alexander Gordeev, 2015/10/15
- Re: [Qemu-devel] [PATCH] hw/arm/virt: Allow zero address for PCI IO space, Peter Maydell, 2015/10/13
- Re: [Qemu-devel] [PATCH] hw/arm/virt: Allow zero address for PCI IO space, Alexander Gordeev, 2015/10/13
- Re: [Qemu-devel] [PATCH] hw/arm/virt: Allow zero address for PCI IO space, Peter Maydell, 2015/10/15
- Re: [Qemu-devel] [PATCH] hw/arm/virt: Allow zero address for PCI IO space, Laurent Vivier, 2015/10/13
- Re: [Qemu-devel] [PATCH] hw/arm/virt: Allow zero address for PCI IO space, Michael S. Tsirkin, 2015/10/13
- Re: [Qemu-devel] [PATCH] hw/arm/virt: Allow zero address for PCI IO space, Peter Maydell, 2015/10/13
- Re: [Qemu-devel] [PATCH] hw/arm/virt: Allow zero address for PCI IO space, Michael S. Tsirkin, 2015/10/13
- Re: [Qemu-devel] [PATCH] hw/arm/virt: Allow zero address for PCI IO space, Peter Maydell, 2015/10/13
- Re: [Qemu-devel] [PATCH] hw/arm/virt: Allow zero address for PCI IO space, Peter Maydell, 2015/10/15
- Re: [Qemu-devel] [PATCH] hw/arm/virt: Allow zero address for PCI IO space,
Laurent Vivier <=
- Re: [Qemu-devel] [PATCH] hw/arm/virt: Allow zero address for PCI IO space, Michael S. Tsirkin, 2015/10/16
- Re: [Qemu-devel] [PATCH] hw/arm/virt: Allow zero address for PCI IO space, Peter Maydell, 2015/10/16
- Re: [Qemu-devel] [PATCH] hw/arm/virt: Allow zero address for PCI IO space, Laurent Vivier, 2015/10/16
- [Qemu-devel] [PATCH v2] hw/arm/virt: Allow zero address for PCI IO space, Alexander Gordeev, 2015/10/15
- Re: [Qemu-devel] [PATCH v2] hw/arm/virt: Allow zero address for PCI IO space, Peter Maydell, 2015/10/15